linux-kernel - CONFIG_PREEMPT_RT Patch and UDP/IP on Ethernet in real time.

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Message-ID: <9335978.1184596094749.JavaMail.ngmail@webmail12>
Date:	Mon, 16 Jul 2007 16:28:14 +0200 (CEST)
From:	"M. Koehrer" <mathias_koehrer@...or.de>
To:	linux-kernel@...r.kernel.org
Subject: CONFIG_PREEMPT_RT Patch and UDP/IP on Ethernet in real time.

Hi everybody,

I have a question concerning Ingo Molnar's realtime preempt patch.
This patch is great go get low latency on timer threads and a really
good real time behaviour.
I want to connect an external, embedded device via Ethernet (UDP/IP) 
to my Linux PC. This communication should be in real time as well.
For this I have a separate network adapter in my PC that is used
solely for this UDP Ethernet traffic.
However, I think all Ethernet traffic is be handled by
the soft IRQ threads [softirq-net-rx] [softirq-net-tx] but I do
not see a way to do real time networking via my dedicated network adapter.

How can I get this UDP networking real time capable?

I use kernel 2.6.21.6 and the related realtime preempt patch.
However, this is a general question that is not related to a certain kernel
version.

Any feedback is welcome.

Thanks a lot!

Regards

Mathias

-- 
Mathias Koehrer
mathias_koehrer@...or.de

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